His weight was harming his health.他体重过重，这有损他的健康。So how do you kill a fungus without harming its host?问题在于,我们如何才能做到不伤害宿主只杀死真菌 呢 ?This part can be cut out without harming the continuity of the story.删去这部分不会损害故事的连续性....
他们将集中教授阅读、写作和算术基础知识。They will concentrate on teaching the basics of reading, writing and arithmetic.他用这个节目的录像带教授英语。He uses tapes of this program to teach English.这本书对于教授文学的老师来说帮助非常大。The book is an invaluable aid to teach...